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-rw-r--r--include/linux/ata.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 8e88efc565b..469952366ed 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -270,6 +270,16 @@ struct ata_taskfile {
#define ata_id_cdb_intr(id) (((id)[0] & 0x60) == 0x20)
+static inline unsigned int ata_id_major_version(const u16 *id)
+{
+ unsigned int mver;
+
+ for (mver = 14; mver >= 1; mver--)
+ if (id[ATA_ID_MAJOR_VER] & (1 << mver))
+ break;
+ return mver;
+}
+
static inline int ata_id_current_chs_valid(const u16 *id)
{
/* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command